Randy Frost is a emeritus professor of psychology at Smith College. He is the co-author of Stuff: Compulsive Hoarding the Meaning of Things. He is widely considered to the world's expert on the topic of hoarding and has published over 100 scientific papers on OCD, hoarding and perferctionsism.
Eric Storch, PhD is a professor in Psychiatry and Behavioral Sciences Department at Baylor College of Medicine. He is an expert on OCD and related conditions in childhood with over 100 publications on these topics
Also Randy Frost and I have published a paper on hoarding in children
Edward H. Plimpton, Randy O. Frost, Brianna C. Abbey and Whitney Dorer "Compulsive Hoarding in Children: 6 Case Studies" International Journal of Cognitive Therapy, 2009,, 2 (1) 88-104